<div class="panel panel-success">
  <div class="panel-heading"> <h6>视频支持</h6></div>
  <div class="panel-body">
       <img src="images/welcome.jpg" alt="..." style="height:200px;width:100%;">
  </div>
	 <ul class="list-group">
  	  <li class="list-group-item"> 5G存储 </li>
  	  <li class="list-group-item">更短的监控周期</li>
  	  <li class="list-group-item">更长的监控时间</li>
  	  <li class="list-group-item">更优质的反馈</li>   
	</ul>
</div>